2220244643 has 4 divisors (see below), whose sum is σ = 2220370608. Its totient is φ = 2220118680.

The previous prime is 2220244627. The next prime is 2220244661. The reversal of 2220244643 is 3464420222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2220244643 - 2⁴ = 2220244627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220244603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31196 + ... + 73577.

It is an arithmetic number, because the mean of its divisors is an integer number (555092652).

Almost surely, 2^2220244643 is an apocalyptic number.

2220244643 is a deficient number, since it is larger than the sum of its proper divisors (125965).

2220244643 is a wasteful number, since it uses less digits than its factorization.

2220244643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125964.

The product of its (nonzero) digits is 18432, while the sum is 29.

The square root of 2220244643 is about 47119.4720152932. The cubic root of 2220244643 is about 1304.5686674600.

Adding to 2220244643 its reverse (3464420222), we get a palindrome (5684664865).

The spelling of 2220244643 in words is "two billion, two hundred twenty million, two hundred forty-four thousand, six hundred forty-three".